SB2020093073 - Red Hat Enterprise Linux 7 update for libssh2

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Main Vulnerability Database SB2020093073

SB2020093073 - Red Hat Enterprise Linux 7 update for libssh2

Published: September 30, 2020

Security Bulletin ID SB2020093073
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: CVE-2019-17498)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack or access sensitive information.

The vulnerability exists due to integer overflow in the "SSH_MSG_DISCONNECT" logic in "packet.c" in a bounds check. A remote attacker can specify an arbitrary (out-of-bounds) offset for a subsequent memory read, trigger out-of-bounds read, disclose sensitive information or cause a denial of service condition on the target system when a user connects to the malicious SSH server.



Remediation

Install update from vendor's website.

References